{"id":"CVE-2026-3463","summary":"xlnt-community xlnt Compound Document binary.hpp append heap-based overflow","details":"A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::binary_writer::append of the file source/detail/binary.hpp of the component Compound Document Parser. This manipulation causes heap-based buffer overflow. The attack can only be executed locally. The exploit has been made available to the public and could be used for attacks. Patch name: 147. It is suggested to install a patch to address this issue.","modified":"2026-08-12T03:51:08.543505577Z","published":"2026-03-03T12:02:10.570Z","database_specific":{"cwe_ids":["CWE-119","CWE-122"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3463.json","cna_assigner":"VulDB"},"references":[{"type":"WEB","url":"https://github.com/xlnt-community/xlnt/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3463.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3463"},{"type":"ADVISORY","url":"https://vuldb.com/?id.348530"},{"type":"ADVISORY","url":"https://vuldb.com/?submit.764643"},{"type":"REPORT","url":"https://github.com/xlnt-community/xlnt/issues/138"},{"type":"REPORT","url":"https://github.com/xlnt-community/xlnt/issues/138#issuecomment-3868381672"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.348530"},{"type":"FIX","url":"https://github.com/xlnt-community/xlnt/pull/147"},{"type":"EVIDENCE","url":"https://github.com/oneafter/0128/blob/main/xl2/repro"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/xlnt-community/xlnt","events":[{"introduced":"8b28e662cbd9e6c2ff3e020a8a163564cbc48e42"},{"last_affected":"3b25b084eab473bb6009b8e3d03ba5ff10bb4891"}],"database_specific":{"cpe":"cpe:2.3:a:xlnt-community:xlnt:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.6.0"},{"last_affected":"1.6.0"},{"introduced":"1.6.1"},{"last_affected":"1.6.1"},{"introduced":"0"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["1.6.0","1.6.1","v1.6.1","v1.6.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3463.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"}]}